Vol. XIV 
fon | Netson, New Birds from Mexico and Guatemala. 44 
whitish which, contrasting with the blackish centres, produces the main 
pattern of coloration; tertiaries and wing-coverts similarly colored, but 
bordered with pale fulvous on inner webs; the tulvous borders heaviest 
on tertiaries; tail slaty gray, with vermiculations of paler gray and 
brown; quills dull brownish, edged on outer borders with ashy; sides and 
under part of neck with fore part of breast conspicuously marked with 
white, black and dull chestnut; sides of breast and flanks dull chestnut, 
the feathers marked on each side near the tip by a black area succeeded 
by a white spot; under tail-coverts chestnut with narrow black shaft-lines 
which broaden near ends of feathers. 
Dimensions.— Wing 104, tail 58, culmen 16, tarsus 29. 
While in the Valley of Comitan, Chiapas, we were told of the 
presence there of a species of Bob-white, but saw none during our 
short stay. At Nenton, in Guatemala, a locality half a day’s 
journey beyond the Valley, we secured a single adult female which 
is very different from the female of any other known bird of this 
genus, and as none of the various species taken in the surround- 
ing region show a gradation toward it, I feel justified in giving the 
new bird specific rank. 
Colinus graysoni nigripectus, new subspecies. PUEBLA 
BoOB-WHITE. 
Type, No. 155522, U. S. Nat. Museum, Dept. Agric. coll., g, Atlixco, 
Puebla, Mexico, August 9, 1893. Collected by E. W. Nelson (Orig. 
No. 1460). 
Distribution.— Plains of southern Puebla. 
Description.— Contrasted with typical C. graysoni, nigripectus may be 
distinguished by its paler shade of rufous both above and below, by the 
greater width of the black area bordering the white of throat and by its 
smaller size. The black of the neck extends from the border of the 
white throat area down over the fore part of the chest and also reaches 
farther back along the sides of the neck. 
Dimensions.—W ing 110, tail 60, culmen 16, tarsus 30. 
We found typical gvaysonz ranging south to the northern end of 
the Valley of Mexico. Thence southeasterly to the City of 
Puebla none were seen, but when we reached Atlixco the present 
subspecies was common on the cultivated plain. 
This subspecies is based upon five adult specimens. 
